Grinding machine for part machining

Abstract

The grinding machine for part machining comprises a grinding machine body, a grinding mechanism and a clamping mechanism are arranged in the grinding machine body, the clamping mechanism is located on one side of the grinding mechanism, an air draft dust removal box is arranged in the grinding machine body, and a plurality of dust removal openings are evenly formed in the grinding machine body; the multiple dust removal openings are evenly distributed in the two sides of the clamping mechanism, communicating holes communicating with the multiple dust removal openings are formed in the grinding machine body, and one side of the air draft dust removal box is fixedly connected with a dust suction pipe communicating with the air draft dust removal box. According to the scheme, during use, when parts are machined, the air draft dust removal box is started, chippings falling into the grinding machine body during part machining can be extracted and removed through cooperation of the dust extraction pipe, the communicating holes and the multiple dust removal openings, and the multiple dust removal openings are evenly distributed in the two sides of the clamping mechanism; and therefore, during cleaning by a worker, scraps in the middle can be directly scraped to the dust removal ports on the two sides by using the scraping plates, and the worker can clean the dust removal ports more conveniently.

Description

Technical Field

[0001] The present application relates to the technical field of parts processing, and in particular to a grinding machine for parts processing. Background Art

[0002] In the manufacturing industry, a part is a component that makes up a machine, device, or product, typically possessing a specific shape, size, and function. Parts can be manufactured individually and then combined with other parts during the assembly process to form a finished product. There are many types of parts, including mechanical parts, electronic parts, and automotive parts, and they are widely used in production and manufacturing across various fields. During part processing, grinding machines are required to precisely control the workpiece's size, shape, and surface quality.

[0003] The utility model with announcement number CN219582486U discloses a grinding machine for parts processing, including a grinding machine body, a collection box and a mounting base. The front of the collection box is provided with an air intake, the inner wall of the air intake is installed with a filter screen, the inner wall of the collection box is provided with a first ventilation chamber, the inner wall of the collection box is provided with a second ventilation chamber, the inner wall of the second ventilation chamber is installed with a dust screen, the inner wall of the second ventilation chamber is installed with a suction fan, and the inner wall of the collection box is provided with a dust collection chamber. The utility model can collect the debris generated by the grinding machine during grinding by installing a collection box. When the suction fan is started, the suction fan sucks the harmful gases generated during grinding into the first ventilation chamber. The harmful gases are sucked into the second ventilation chamber by the suction fan, purified by the activated carbon plate, and discharged to the outside. Metal debris follows the harmful gases through the dust screen and is blocked by the dust screen and falls into the dust collection chamber. The dust collection chamber then falls into the drawer, thereby achieving the purpose of collecting metal debris generated during parts processing by the grinding machine.

[0004] When the above technical solution is in use, the suction fan is started, and the suction fan generates suction to suck the metal debris and harmful gases generated during grinding into the first ventilation chamber. The harmful gases are sucked into the second ventilation chamber by the suction fan, purified by the activated carbon plate, and discharged to the outside. The metal debris is blocked by the dustproof net when following the harmful gas through the dustproof net and falls into the dust collecting chamber, and then falls into the drawer from the dust collecting chamber, thereby achieving the purpose of collecting the metal debris generated during the processing of parts by the grinder. However, the above solution is more suitable for processing relatively small metal debris. When the ground debris is large, there may be certain requirements for the suction force of the suction fan and the mesh size of the filter. If the suction force of the suction fan is not good, the larger debris will fall on the grinder, which is inconvenient to clean manually and is not conducive to practical use. Therefore, those skilled in the art provide a grinder for parts processing to solve the problems raised in the above background technology. Utility Model Content

[0005] In order to solve the problem raised in the above background technology that when the ground debris is large, there may be certain requirements on the suction force of the vacuum fan and the mesh size of the filter. If the suction force of the vacuum fan is not good, the larger debris will fall on the grinder, which is inconvenient to clean manually. This application provides a grinder for parts processing.

[0006] The parts processing grinding machine provided in this application adopts the following technical solutions:

[0007] A grinder for parts processing includes a grinder body, wherein a grinding mechanism and a clamping mechanism are arranged inside the grinder body, wherein the clamping mechanism is located on one side of the grinding mechanism, and an exhaust dust removal box is arranged inside the grinder body, wherein a plurality of dust removal ports are evenly opened inside the grinder body, and the plurality of dust removal ports are evenly distributed on both sides of the clamping mechanism, and a connecting hole connected to the plurality of dust removal ports is opened inside the grinder body, and a dust extraction pipe connected to the exhaust dust removal box is fixedly connected to one side of the exhaust dust removal box, and the end of the dust extraction pipe away from the exhaust dust removal box is connected to the connecting hole.

[0008] By adopting the above technical solution, while processing parts, the exhaust dust removal box is started to cooperate with the dust removal pipe, connecting hole and several dust removal ports to remove the debris dropped into the grinding machine body during the processing of parts, and the several dust removal ports are evenly distributed on both sides of the clamping mechanism, so that when cleaning, the scraper can be used directly to scrape the debris in the middle to the dust removal ports on both sides, making cleaning more convenient for personnel.

[0009] Preferably, the grinder body includes a rectangular table, the grinding mechanism and the clamping mechanism are both located on the upper surface of the rectangular table, several dust removal ports are evenly opened on the upper surface of the rectangular table, a protective cover is fixedly connected to the upper surface of the rectangular table, the grinding mechanism and the clamping mechanism are evenly located inside the protective cover, and several universal wheels are evenly fixedly connected to the lower surface of the rectangular table.

[0010] By adopting the above technical solution, the processing space above the rectangular table can be covered by the protective cover for protection, and the plurality of universal wheels can facilitate personnel to move the grinding machine body.

[0011] Preferably, the grinding mechanism includes a first motor slidably connected to the upper surface of the rectangular table, and the output end of the first motor is fixedly connected to the grinding disc.

[0012] By adopting the above technical solution, the parts can be processed by starting the first motor and controlling the rotation of the grinding disc.

[0013] Preferably, the clamping mechanism includes symmetrically arranged hydraulic cylinders, the lower surfaces of the hydraulic cylinders are fixedly connected to the upper surface of the rectangular platform, and the output ends of the symmetrically arranged hydraulic cylinders are both fixedly connected to clamping plates.

[0014] By adopting the above technical solution, the parts placed between the symmetrically arranged clamping plates can be clamped and limited by starting the symmetrically arranged hydraulic cylinders and controlling the movement of the symmetrically arranged clamping plates.

[0015] Preferably, the exhaust dust removal box includes a rectangular box fixedly connected to the inside of the rectangular platform, the end of the dust extraction pipe away from the connecting hole passes through the rectangular box, the bottom of the inner wall of the rectangular box is connected to an exhaust mechanism by bolts, the end of the exhaust mechanism away from the dust extraction pipe passes through the rectangular box, the inner wall of the rectangular box is slidably connected to a filter plate, the filter plate is located between the dust extraction pipe and the exhaust mechanism, and one side of the rectangular box is movably connected to a cleaning door through a hinge.

[0016] By adopting the above technical solution, when the exhaust mechanism is started, the debris can be sucked into the interior of the rectangular box through the dust extraction pipe, and then filtered to a certain extent through the filter plate. The cleaning door can be opened and closed as needed, thereby facilitating personnel to clean the debris and filter plate inside the rectangular box.

[0017] Preferably, the exhaust mechanism is fixedly connected to an air supply pipe at one end away from the filter plate, and the air supply pipe is fixedly connected to a ventilation pipe at one end away from the exhaust mechanism, passing through the rectangular table and the protective cover. Several blower heads connected to the ventilation pipe are evenly fixed at the bottom of the ventilation pipe, and an adjustment mechanism is fixedly connected to the top of the ventilation pipe. Both sides of the adjustment mechanism are fixedly connected to the protective cover.

[0018] By adopting the above technical solution, when the exhaust mechanism is exhausting air, the air outlet of the exhaust mechanism cooperates with the air duct to transport gas into the inside of the ventilation duct, and then several blowing heads can be used to blow the debris in the middle of the rectangular table toward the dust removal ports opened on both sides, thereby replacing manual cleaning of the debris on the rectangular table, making the use of this application more convenient.

[0019] Preferably, the adjustment mechanism includes a second motor fixedly connected to the outer wall of the protective cover, the output end of the second motor passes through the protective cover and is fixedly connected to a threaded rod, the end of the threaded rod away from the second motor is rotatably connected to the inner wall of the protective cover, the outer wall of the threaded rod is threadedly connected to a movable plate, the lower surface of the movable plate is fixedly connected to the top of the ventilation pipe, and the two ends of the movable plate are slidably connected to guide rods, and both ends of the guide rods are fixedly connected to the inner wall of the protective cover.

[0020] By adopting the above technical solution, starting the second motor can drive the threaded rod to rotate and at the same time control the movable plate to drive the ventilation pipe to move under the limitation of the symmetrically arranged guide rods.

[0021] In summary, this application has the following beneficial technical effects:

[0022] 1. The grinding machine for parts processing can process the parts clamped by the clamping mechanism by starting the grinding mechanism. While processing the parts, the exhaust dust box is started to cooperate with the dust extraction pipe, the connecting hole and the plurality of dust removal ports to remove the debris dropped into the grinding machine body during the processing of the parts. The dust removal ports are large in strip shape, so that the present application can suck out relatively large metal debris when in use. The plurality of dust removal ports are evenly distributed on both sides of the clamping mechanism, so that when cleaning, the personnel can directly use the scraper to scrape the debris in the middle to the dust removal ports on both sides, which can make cleaning more convenient for the personnel.

[0023] 2. The parts processing grinder has a protective cover that can cover the processing space above the rectangular table for protection. The plurality of universal wheels can facilitate the movement of the grinder body. The first motor is started to control the rotation of the grinding disc to process the parts. The symmetrically arranged hydraulic cylinders are started to control the movement of the symmetrically arranged clamping plates to clamp and limit the parts placed between the symmetrically arranged clamping plates.

[0024] 3. The grinder for parts processing is provided with an exhaust mechanism which, when started, can suck the debris into the interior of the rectangular box through the dust extraction pipe, and then filter it through the filter plate. The cleaning door can facilitate personnel to clean the debris inside the rectangular box and the filter plate. When the exhaust mechanism is exhausting air, the air outlet cooperates with the air supply pipe to transport gas to the interior of the ventilation pipe, and then several air blowing heads can be used to blow the debris in the middle of the rectangular table toward the dust removal ports opened on both sides, thereby replacing manual cleaning of the debris on the rectangular table, making the use of this application more convenient. When the second motor is started, while driving the threaded rod to rotate, it can control the movable plate to drive the ventilation pipe to move under the limit of the symmetrically arranged guide rods. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0026] Figure 2 is a schematic cross-sectional structural diagram in an embodiment of the present application;

[0027] Figure 3 This is an embodiment of the present application Figure 1 A schematic diagram of the structure enlargement at point A;

[0028] Figure 4It is a schematic diagram of the structure of the adjustment mechanism in the embodiment of the present application.

[0029] Explanation of the accompanying symbols: 1. Grinder body; 101. Rectangular table; 102. Protective cover; 103. Universal wheel; 2. Grinding mechanism; 201. First motor; 202. Grinding disc; 3. Clamping mechanism; 301. Hydraulic cylinder; 302. Clamping plate; 4. Exhaust and dust removal box; 401. Rectangular box; 402. Exhaust mechanism; 403. Filter plate; 404. Cleaning door; 5. Dust removal port; 6. Connecting hole; 7. Dust extraction pipe; 8. Air supply pipe; 9. Ventilation pipe; 10. Blowing head; 11. Adjusting mechanism; 1101. Second motor; 1102. Threaded rod; 1103. Moving plate; 1104. Guide rod. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-4 This application is described in further detail.

[0031] The embodiment of the present application discloses a grinding machine for parts processing. Figure 1 and Figure 2 The grinding machine for parts processing includes a grinding machine body 1, a grinding mechanism 2 and a clamping mechanism 3 are arranged inside the grinding machine body 1, the clamping mechanism 3 is located on one side of the grinding mechanism 2, an exhaust dust removal box 4 is arranged inside the grinding machine body 1, a plurality of dust removal ports 5 are evenly opened inside the grinding machine body 1, and the plurality of dust removal ports 5 are evenly distributed on both sides of the clamping mechanism 3, a connecting hole 6 connected to the plurality of dust removal ports 5 is opened inside the grinding machine body 1, and a dust extraction pipe 7 connected to the exhaust dust removal box 4 is fixedly connected to one side of the exhaust dust removal box 4, and the end of the dust extraction pipe 7 away from the exhaust dust removal box 4 is connected to the connecting hole 6.

[0032] In this embodiment, the grinding machine body 1 provided in the parts processing grinding machine can limit the installation position of the grinding mechanism 2 and the clamping mechanism 3. The parts that need to be ground can be clamped and limited by the clamping mechanism 3. After the parts are clamped by the clamping mechanism 3, the parts can be processed by starting the grinding mechanism 2, and an exhaust dust removal box 4 is provided inside the grinding machine body 1. Specifically, when the parts are processed in this application, the exhaust dust removal box 4 can be controlled to start. When the exhaust dust removal box 4 is started, the exhaust dust removal box 4 is set. The dust pipe 7, the connecting hole 6 and the several dust removal ports 5 cooperate to remove the debris dropped into the grinding machine body 1 when processing parts, and the dust removal ports 5 are large in strip shape, so that the present application can suck in relatively large metal debris when in use. Furthermore, the several dust removal ports 5 are evenly distributed on both sides of the clamping mechanism 3, so that when cleaning, the personnel can directly use a scraper to scrape the debris in the middle to the dust removal ports 5 on both sides, thereby making cleaning more convenient for the personnel and making the present application more conducive to practical use.

[0033] In a further preferred embodiment of the present invention, Figure 1 and Figure 2 As shown, the grinding machine body 1 includes a rectangular table 101, the grinding mechanism 2 and the clamping mechanism 3 are both located on the upper surface of the rectangular table 101, a number of dust removal ports 5 are evenly opened on the upper surface of the rectangular table 101, a protective cover 102 is fixedly connected to the upper surface of the rectangular table 101, the grinding mechanism 2 and the clamping mechanism 3 are evenly located inside the protective cover 102, and a number of universal wheels 103 are evenly fixedly connected to the lower surface of the rectangular table 101.

[0034] In this embodiment, the rectangular table 101 can limit the installation position of the grinding mechanism 2 and the clamping mechanism 3. The protective cover 102 can cover the processing space above the rectangular table 101, which plays a certain protective role. Several universal wheels 103 are evenly fixedly connected to the lower surface of the rectangular table 101. The several universal wheels 103 set up can facilitate personnel to move the grinder body 1.

[0035] In a further preferred embodiment of the present invention, Figure 2 As shown, the grinding mechanism 2 includes a first motor 201 slidably connected to the upper surface of the rectangular platform 101 , and a grinding disc 202 is fixedly connected to the output end of the first motor 201 .

[0036] In this embodiment, starting the first motor 201 can control the grinding disc 202 to rotate, and the parts can be processed by the rotation of the grinding disc 202, and the first motor 201 and the rectangular table 101 are connected by sliding on a slide rail, so that personnel can adjust the use position of the first motor 201 according to needs.

[0037] In a further preferred embodiment of the present invention, Figure 1 and Figure 2 As shown, the clamping mechanism 3 includes symmetrically arranged hydraulic cylinders 301 , the lower surface of the hydraulic cylinders 301 is fixedly connected to the upper surface of the rectangular platform 101 , and the output ends of the symmetrically arranged hydraulic cylinders 301 are both fixedly connected to the clamping plates 302 .

[0038] In this embodiment, by starting the symmetrically arranged hydraulic cylinders 301, the symmetrically arranged clamping plates 302 can be controlled to move respectively, and the symmetrically arranged clamping plates 302 can be moved toward each other to clamp and limit the parts placed between the symmetrically arranged clamping plates 302.

[0039] In a further preferred embodiment of the present invention, Figure 1 、 Figure 2 and Figure 3As shown, the exhaust dust removal box 4 includes a rectangular box 401 fixedly connected to the inside of the rectangular platform 101, the end of the dust extraction pipe 7 away from the connecting hole 6 passes through the rectangular box 401, the bottom of the inner wall of the rectangular box 401 is connected to the exhaust mechanism 402 by bolts, the end of the exhaust mechanism 402 away from the dust extraction pipe 7 passes through the rectangular box 401, the inner wall of the rectangular box 401 is slidably connected with a filter plate 403, the filter plate 403 is located between the dust extraction pipe 7 and the exhaust mechanism 402, and one side of the rectangular box 401 is movably connected to a cleaning door 404 through a hinge.

[0040] In this embodiment, the installation positions of the exhaust mechanism 402 and the filter plate 403 can be limited by the rectangular box 401. When the exhaust mechanism 402 is started, dust can be extracted through the dust extraction pipe 7. The debris sucked into the rectangular box 401 through the dust extraction pipe 7 can be filtered to a certain extent through the filter plate 403. Furthermore, one side of the rectangular box 401 is movably connected to a cleaning door 404 through a hinge. The cleaning door 404 can be opened and closed as needed, thereby facilitating personnel to clean the debris inside the rectangular box 401, or to disassemble, clean or replace the filter plate 403.

[0041] In a further preferred embodiment of the present invention, Figure 1 、 Figure 2 and Figure 4 As shown, one end of the exhaust mechanism 402 away from the filter plate 403 is fixedly connected to the air supply pipe 8, and the one end of the air supply pipe 8 away from the exhaust mechanism 402 passes through the rectangular platform 101 and the protective cover 102 and is fixedly connected to the ventilation pipe 9. Several blowing heads 10 connected to the ventilation pipe 9 are evenly fixed on the bottom of the ventilation pipe 9, and the top of the ventilation pipe 9 is fixedly connected to the adjustment mechanism 11, and both sides of the adjustment mechanism 11 are fixedly connected to the protective cover 102.

[0042] In this embodiment, when the exhaust mechanism 402 starts exhausting, the air can be transported to the inside of the ventilation pipe 9 through the air outlet of the exhaust mechanism 402 in cooperation with the air supply pipe 8, and then the air can be blown onto the rectangular table 101 through the several blowing heads 10 provided, and the blowing heads 10 are evenly distributed above the clamping mechanism 3. When the blowing heads 10 blow air, the debris in the middle of the rectangular table 101 can be blown toward the dust removal ports 5 opened on both sides, thereby replacing manual cleaning of the debris on the rectangular table 101, making this application more convenient to use. Furthermore, an adjustment mechanism 11 is fixedly connected to the top of the ventilation pipe 9, and by starting the adjustment mechanism 11, the ventilation pipe 9 can be controlled to move back and forth above the clamping mechanism 3.

[0043] In a further preferred embodiment of the present invention, Figure 1 、 Figure 2 and Figure 4As shown, the adjustment mechanism 11 includes a second motor 1101 fixedly connected to the outer wall of the protective cover 102, the output end of the second motor 1101 passes through the protective cover 102 and is fixedly connected to a threaded rod 1102, the end of the threaded rod 1102 away from the second motor 1101 is rotatably connected to the inner wall of the protective cover 102, the outer wall of the threaded rod 1102 is threadedly connected to a movable plate 1103, the lower surface of the movable plate 1103 is fixedly connected to the top of the ventilation pipe 9, and the two ends of the movable plate 1103 are slidably connected to the guide rod 1104, and both ends of the guide rod 1104 are fixedly connected to the inner wall of the protective cover 102.

[0044] In this embodiment, starting the second motor 1101 can drive the threaded rod 1102 to rotate. While the threaded rod 1102 rotates, under the limitation of the symmetrically arranged guide rod 1104, the movable plate 1103 can be controlled to move. The position of the ventilation pipe 9 can be adjusted by moving the movable plate 1103.

[0045] The implementation principle of the parts processing grinder in the embodiment of the present application is as follows:

[0046] During use, the parts that need to be ground are clamped and limited by the clamping mechanism 3, and the grinding mechanism 2 is started to process the parts. While the present application is processing the parts, the exhaust dust box 4 is controlled to start and cooperate with the provided dust extraction pipe 7, the connecting hole 6 and the several dust removal ports 5 to remove the debris dropped into the grinding machine body 1 when processing the parts, and the dust removal ports 5 opened are strip-shaped and large, so that the present application can suck in relatively large pieces of metal debris when in use, and the several dust removal ports 5 opened are evenly distributed on both sides of the clamping mechanism 3, so that when cleaning, the personnel can directly use the scraper to scrape the debris in the middle to the dust removal ports 5 on both sides, which can make cleaning more convenient for personnel and make the present application more conducive to practical use.

[0047] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A grinding machine for parts processing, comprising a grinding machine body (1), characterized in that: A grinding mechanism (2) and a clamping mechanism (3) are provided inside the grinding machine body (1), and the clamping mechanism (3) is located on one side of the grinding mechanism (2). An exhaust dust removal box (4) is provided inside the grinding machine body (1), and a plurality of dust removal ports (5) are evenly opened inside the grinding machine body (1), and the plurality of dust removal ports (5) are evenly distributed on both sides of the clamping mechanism (3). A connecting hole (6) connected to the plurality of dust removal ports (5) is opened inside the grinding machine body (1), and a dust extraction pipe (7) connected to the exhaust dust removal box (4) is fixedly connected to one side of the exhaust dust removal box (4), and the end of the dust extraction pipe (7) away from the exhaust dust removal box (4) is connected to the connecting hole (6).

2. The parts processing grinding machine according to claim 1, characterized in that: The grinding machine body (1) comprises a rectangular platform (101), the grinding mechanism (2) and the clamping mechanism (3) are both located on the upper surface of the rectangular platform (101), a plurality of dust removal ports (5) are evenly arranged on the upper surface of the rectangular platform (101), a protective cover (102) is fixedly connected to the upper surface of the rectangular platform (101), the grinding mechanism (2) and the clamping mechanism (3) are evenly located inside the protective cover (102), and a plurality of universal wheels (103) are evenly fixedly connected to the lower surface of the rectangular platform (101).

3. The parts processing grinding machine according to claim 2, characterized in that: The grinding mechanism (2) comprises a first motor (201) slidably connected to the upper surface of the rectangular platform (101), and a grinding disc (202) is fixedly connected to the output end of the first motor (201).

4. The parts processing grinding machine according to claim 2, characterized in that: The clamping mechanism (3) comprises symmetrically arranged hydraulic cylinders (301), the lower surfaces of the hydraulic cylinders (301) being fixedly connected to the upper surface of the rectangular platform (101), and the output ends of the symmetrically arranged hydraulic cylinders (301) being fixedly connected to clamping plates (302).

5. The parts processing grinding machine according to claim 2, characterized in that: The exhaust dust removal box (4) includes a rectangular box (401) fixedly connected to the inside of the rectangular platform (101), the end of the dust extraction pipe (7) away from the connecting hole (6) passes through the rectangular box (401), the bottom of the inner wall of the rectangular box (401) is connected to an exhaust mechanism (402) by bolts, the end of the exhaust mechanism (402) away from the dust extraction pipe (7) passes through the rectangular box (401), the inner wall of the rectangular box (401) is slidably connected to a filter plate (403), the filter plate (403) is located between the dust extraction pipe (7) and the exhaust mechanism (402), and one side of the rectangular box (401) is movably connected to a cleaning door (404) by a hinge.

6. The parts processing grinding machine according to claim 5, characterized in that: The end of the exhaust mechanism (402) away from the filter plate (403) is fixedly connected to an air supply pipe (8), and the end of the air supply pipe (8) away from the exhaust mechanism (402) passes through the rectangular platform (101) and the protective cover (102) and is fixedly connected to a ventilation pipe (9). The bottom of the ventilation pipe (9) is evenly fixed with a plurality of blowing heads (10) connected to the ventilation pipe (9), and the top of the ventilation pipe (9) is fixedly connected to an adjustment mechanism (11), and both sides of the adjustment mechanism (11) are fixedly connected to the protective cover (102).

7. The parts processing grinding machine according to claim 6, characterized in that: The regulating mechanism (11) comprises a second motor (1101) fixedly connected to the outer wall of the protective cover (102); an output end of the second motor (1101) passes through the protective cover (102) and is fixedly connected to a threaded rod (1102); an end of the threaded rod (1102) away from the second motor (1101) is rotatably connected to the inner wall of the protective cover (102); a movable plate (1103) is threadedly connected to the outer wall of the threaded rod (1102); a lower surface of the movable plate (1103) is fixedly connected to the top of the ventilation pipe (9); guide rods (1104) are slidably connected to both ends of the movable plate (1103); and both ends of the guide rod (1104) are fixedly connected to the inner wall of the protective cover (102).

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